In China, they're currently working on the Siduhe Grand Bridge, what will be the tallest bridge in the world when completed. How tall is it? Well, let's just say that you could put the Empire State Building in the valley below it and it wouldn't touch the bridge, with a whopping 360 feet of overhead. So how do you get cables across a chasm that large to build a bridge with? Rockets, of course.

http://gizmodo.com/5095682/worlds-ta...f-some-rockets